Electric push



(No Model.)

J. I. WOLLENSAK.

ELECTRIC PUSH.

No. 459,605. Y Patented Sept. 15,1891.

l@ @j A @5.,

1522672 @nu 6967777 MZZZW UNITED 4STATES PATENT OFFICE.lv

JOHN F. VOLLENSAK, OF CHICAGO, ILLINOIS. l

ELECTRIC PUSH.

SPECIFICATION forming part of Letters Patent No. 459,605, datedSeptember 15, 1891. i

Application filed January 28, 1891. Serial No. 379,423. (No model.)

To all whom, it may concern:

Beit known that I, JOHN F. WoLLENsAK,

a citizen of the United States, residing at Chicago, Illinois, haveinvented certain new and useful Improvements in Electric Pushes, ofwhich the following is a specification.

This invention is intended tobe an improvement upon the one covered bymy patent, No. 421,340, issued to me February 1l, 1890, in that theseparate contact-pieces are dispensed with and a circuit effectedthrough the direct instrumentality of the bindingscrews; and myinvention consists in the features and details of constructionhereinafter described and claimed.

In the drawings, Figure l is a vertical section taken through myimproved push in line 1 of Fig. 2, looking in the direction of thearrow. Fig.'2 isa plan View of the bottom side of the face-plate. Fig. 3is a plan view of the bottom of the insulated back, and Figs. 4 and 5are transverse sections showing the invention applied to single pushes.

In making my improved electric push I make a plate Aof any properinsulating material or of metal insulated from the binding-screws, andhereinafter in speaking in the specification or claims of an insulatedplate I mean to indicate either kind. I provide this plate withbinding-screws B arranged on the outside or back. The bindingscrews passthrough the plate and extend into the interior of the push, so thattheir ends may serve the purpose of contact-points in completing thecircuit. I make a face-plate C, provided with holes for the buttonsadapted to be secured in proper position upon the case D. I arrange arodE between the rows of pushes where the invention is applied tocompound pushes, which may be supported in place in any suitable manner.This rod is intended to extend along the inner side of the face asuicient distance to aord means for supporting as many springs F as thenumber of buttons intended to be used may require. These springs aremade of wire containing suflicient resilience, and are attached to therod by coiling them around the same or in any other convenient mannerand extending them out oneither side to bring the ends of each springover two of the button-holes.

The ends of the springs are turned down so` as to form points f, whichrest in their normal position immediately over the exposed ends of thebinding-screws, which, as before said, extend down into the interior ofthe push. The buttons are'provided at their inner ends with a slot orchannel G, as shown in the drawings, and the springs are intended torest in these slotsor channels, so as to hold them in their properpositions, and so that they will be prevented from turning.

round. The contact-pieces usually employed, and shown in my patent onvwhich this is an improvement, are entirely dispensed with, and thebinding-screws themselves made to not only hold the wires of the circuitin place,

but to afford the means for completing the circuit when the buttons arepushed in, so as to bring the points f of the springs against them. Thenecessity of making and applying such contact-pieces is thereby entirelydispensed with. The circuit is made by carrying a wire L from thebattery to any desired point upon the case or frame D, which it will beunderstood is made of metal and capable of acting as a conductor. Y Thecurrent of electricity will pass along the case and enter the rod E,whence it willpass into the springs F, which are carried into contactwith the binding-screws B when the buttons are pushed in In Figs. 4 and5 I have illustrated single pushes with the binding screws extendedthrough the insulated back and far enough into the push to enable thebutton to be pressed against the points of the screws when it is pushedin. When the button is made of some non-conducting material, as in Fig.4, it may be faced with metal I-I in the usual way, as shown; but whereit is made entirely of metal, as inV Fig. 5, such metal of course isunnecessary, and the circuit is completed as soon as the button materialtouches the points of the binding-screws. In all the iigures, however,the binding-,screws are made to perform the double function of attachingthe wires of the circuit and of aording the instrumentality forcompleting the circuit as soon as the buttons are pressed down enough tobring the metal, whether springs, facingplate, or the material of thebutton, into contact with the points of the screws.

IOO

I may say, in conclusion, that the essential improvement in my presentinvention over my patent above mentioned consists in the fact that Iarrange the binding-screws on the outside of the insulated plate of thepush, extend them through into the interior of the push far enough toenable them to operate as the means for completing the circuit when thebuttons are pushed in, and dispensing with the usual separatecontact-pieces which have heretofore been employed to enable the circuitto be completed.

What I regard as new, and desire to secure by Letters Patent, is-

I. In electric pushes, tho combination of a plate of insulatingmaterial, binding-screws for holding both ends of the circuit-wires,arranged on the outside and bot-h extending through into the interior tooperate as contactpoints, and a face having aloose button whichcompletes the circuit as itis pressed in through the directinstrumentality of both bindingscrews, substantially as described. V

2. In electric pushes, the combination of a plate of insulatingmaterial, binding-screws .for holding the ends of the circuit-Wires,arranged on the outside and extending through into the interior tooperate as contact-points, a face having buttons slotted at their innerends, and springs resting in the slots of the buttons and preventingthem from turning and adapted to be pressed into position by the buttonsto complete the circuit through direct contact with the binding-screws,substantially as described.

3. In electric pushes, the combination of a plate of insulatingmaterial, binding-screws for holding the ends of the circuit-Wires,arranged on the outside and extending through into the interior tooperate as contact-points, a face having buttons, a rod supported on theinner side of the face, and springs attached to the rod and extendingover the buttonholes and adapted to be pressed into position by thebuttons to complete the circuit through direct contact With thebinding-screws, substantially as described.

4. In electric pushes, the combination of a plate of insulatingmaterial, binding-screws for holding the ends of the circuit-Wires, ar-

ranged on the outside and extending through int-o the interior tooperate as contact-points, a face having buttons slotted at their innerends, a rod supported on the inner side ot the face, and springsattached to the rod and eX- tending over the button-holes and resting inthe slots of the buttons and preventing them from turning and adapted tobe pressed into position by the buttons to complete the circuit throughdirect contact with the bindingscrews, substantially as described.

5. In electric pushes, the combination of a plate of insulatingmaterial, binding-screws for holding the ends of thc circuit-Wires,arranged on the outside andl extending through into the interior tooperate as contact-points, a case for supporting the plate and attachingit to the place of use, a face having buttons slotted at their innerends, a -rod supported on the inner side of the face, springs attachedto the rod and extending over the buttonholes and resting in the slotsof the buttons and preventing them from turning and adapted to bepressed into position by the buttons to complete the circuit throughdirect contact with the binding-screws, and a frame surrounding theplate and holding the same at the proper distance from the plate,substantially as described.

JOHN F. WoLLENsAK.

Witnesses:

THOMAS A. BANNING, SAMUEL E. HIBBEN.

